Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Claude-Code-Community-Ireland/claude-code-resources --skill api-designgit clone --depth 1 https://github.com/Claude-Code-Community-Ireland/claude-code-resourcesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/claude-code-community-ireland/claude-code-resources/api-design)<a href="https://agentmods.dev/skills/claude-code-community-ireland/claude-code-resources/api-design"><img src="https://agentmods.dev/badge/skills/claude-code-community-ireland/claude-code-resources/api-design/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/claude-code-community-ireland/claude-code-resources/api-design"><img src="https://agentmods.dev/badge/skills/claude-code-community-ireland/claude-code-resources/api-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.03075 |
| Opus 5.5 | $0.00014 | $0.01230 |
| Sonnet 5.5 | $0.00007 | $0.00615 |
| Haiku 4.5 | $0.00003 | $0.00308 |
Grade A, and why
api-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 392 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Design
RESTful Resource Naming
Conventions
| Rule | Good | Bad |
|---|---|---|
| Use plural nouns | /users |
/user, /getUsers |
| Use nouns, not verbs | POST /orders |
POST /createOrder |
| Nest for relationships | /users/123/orders |
/getUserOrders?userId=123 |
| Use kebab-case | /user-profiles |
/userProfiles, /user_profiles |
| Keep URLs shallow (max 3) | /users/123/orders |
/users/123/orders/456/items/789 |
| Use query params for filters | /orders?status=pending |
/orders/pending |
| Collection + resource IDs | /users/123 |
/user?id=123 |
URL Structure
https://api.example.com/v1/users # Collection
https://api.example.com/v1/users/123 # Single resource
https://api.example.com/v1/users/123/orders # Nested collection
https://api.example.com/v1/users/123/orders/456 # Nested resource
https://api.example.com/v1/orders?status=pending # Filtered collection
Actions That Do Not Map to CRUD
For operations that are not simple CRUD, use a sub-resource or action noun:
POST /users/123/activate # State transition
POST /orders/456/refund # Domain action
POST /reports/export # Process trigger
HTTP Method Semantics
| Method | Purpose | Idempotent | Safe | Request Body | Success Code |
|---|---|---|---|---|---|
GET |
Retrieve resource(s) | Yes | Yes | No | 200 |
POST |
Create a resource | No | No | Yes | 201 |
PUT |
Full replacement | Yes | No | Yes | 200 |
PATCH |
Partial update | No* | No | Yes | 200 |
DELETE |
Remove a resource | Yes | No | No | 204 |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 392 lines · 34 tokens per session scan A 8903ac28adf5
api-design is a skill published in the GitHub repository Claude-Code-Community-Ireland/claude-code-resources (11 stars, last pushed 4mo ago), licensed MIT. It adds 34 tokens to every session and 3,075 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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